How Short Videos, Excessive Device Use, and Screen Time Can Affect a Child’s Attention and School Success

by Adam Thewes, Head of School

Children today are surrounded by phones, tablets, streaming videos, games, and short-form content such as YouTube Shorts, TikTok, and Instagram Reels. Technology can be useful when it is limited, intentional, and age appropriate. However, frequent use of fast-paced digital media can make it harder for children to focus, regulate their emotions, follow directions, complete work, and participate successfully at school.

The concern is not simply that a child is “using a screen.” The bigger concern is the type of screen use, how often it happens, and what it replaces. Short-form videos are especially concerning because they provide constant novelty and quick rewards. A child can swipe from one video to another every few seconds, moving rapidly between music, humor, movement, bright colors, and emotional reactions. Over time, slower activities such as reading, listening to a lesson, completing classroom work, building with hands-on materials, or engaging in imaginative play may begin to feel boring or frustrating by comparison.

Research supports this concern. A 2025 study of school-age children found that short-form video use was significantly associated with higher inattentive behaviors, with stronger associations among younger children (Chiencharoenthanakij et al., 2025). This does not prove that short videos alone cause attention problems, but it does suggest that frequent short-form video use may be connected to difficulty sustaining attention. Broader screen-time research has found similar concerns. Tamana et al. (2019) found that preschool children with more than two hours of screen time per day had a significantly higher risk of meeting criteria for ADHD-type symptoms, including inattention.

At school, attention is needed throughout the day. A child must listen to lessons, follow multi-step directions, wait for a turn, choose work, complete tasks, clean up materials, transition calmly, and interact respectfully with peers. When a child becomes used to fast, highly stimulating digital content, the normal pace of the classroom can feel too slow. Instead of staying with one activity long enough to experience success, the child may look for something new, interrupt others, wander away from work, rush through lessons, or need frequent adult redirection.

This can be especially noticeable in a Montessori classroom. Montessori learning depends heavily on concentration, independence, hands-on work, repetition, and internal motivation. Children are expected to build focus by choosing meaningful work and staying with it. Excessive device use may interfere with this process because it can train the child to expect instant entertainment rather than gradual discovery. At school, this may look like difficulty settling into work, avoiding challenging tasks, becoming frustrated quickly, or needing an adult to constantly guide the child back to the next step.

Heavy device use can also affect emotional regulation. Short videos and games often provide immediate rewards: swipe, laugh, win, repeat. School does not work that way. In the classroom, children must wait, try again, share space, accept limits, and work through frustration. If a child is used to constant stimulation and immediate gratification, ordinary classroom expectations may feel more difficult. This can appear as refusal, defiance, emotional outbursts, impulsivity, or avoidance, even when the deeper issue may be weak self-regulation.

Device use can also affect sleep, which directly affects school performance. A 2024 randomized clinical trial published in JAMA Pediatrics found that removing screen time in the hour before bed was feasible and caused preliminary improvements in sleep (Pickard et al., 2024). When children do not sleep well, teachers often see the effects the next day: shorter attention span, more impulsive behavior, stronger emotional reactions, and less stamina for learning.

Excessive device use may also reduce opportunities for social development. Children practice social skills through real interaction: reading facial expressions, negotiating with peers, solving problems, using words, waiting, sharing, and showing empathy. If screen time replaces conversation, outdoor play, imaginative play, family routines, or peer interaction, the child may have fewer opportunities to practice these skills. At school, this can show up as difficulty joining play, trouble sharing, poor problem-solving with classmates, or needing adults to step in more often.

The American Academy of Pediatrics explains that there is not one perfect screen-time limit that applies to every child and teenager. Instead, families should consider the child’s age, the content, whether an adult is involved, and whether screen use is interfering with sleep, school, physical activity, family connection, or behavior (American Academy of Pediatrics [AAP], 2025). The AAP also recommends a family media plan so that screens do not crowd out the activities children need for healthy development.

Recommended Device Use by Age Group

Age Group	Recommendation
Under 2 years old	No screen time is recommended, other than video chatting with family. Children under 2 learn best through real-life interaction, movement, language, touch, play, and connection with caregivers. At this age, screens should not be used for entertainment, calming, or distraction.
Ages 2–5	Limit screen use to about 1 hour per day of high-quality programming. At this age, slower, real-life shows are generally better than fast-paced cartoons. Shows with real people, real animals, nature, music, cooking, building, or everyday routines are easier for young children to connect to the real world. Adults should watch with the child and talk about what they are seeing.
Ages 6–12	Set consistent daily limits. Screen use should not replace sleep, schoolwork, reading, outdoor play, chores, family time, or face-to-face interaction. For a child already struggling with attention at school, a reasonable school-week goal would be 30–60 minutes or less of recreational screen time per day, with no short-form videos on school nights.
Teens	Focus on balance, safety, sleep, and responsibility. Families should set limits on both the amount and type of media and make sure it does not interfere with school, sleep, family responsibilities, physical activity, or emotional well-being.

For children under 2, a no-screen recommendation is what I think is a conservative and developmentally appropriate approach. The AAP recommends avoiding digital media for children younger than 18 months except video chatting, and for children 18–24 months, media should only be introduced carefully with high-quality programming and adult support. The World Health Organization also recommends no sedentary screen time for children under 1 and no more than one hour for children ages 2–4, with less being better.

For children age 2 and older, the kind of media matters. A slow, realistic program showing real people, animals, nature, music, movement, or everyday routines is generally a better choice than fast-paced cartoons or short videos. Young children are still learning how to connect what they see on a screen to real life. Fast cartoons, quick scene changes, exaggerated sounds, and unrealistic situations can overstimulate children and may make it harder for them to settle into slower real-world activities afterward.

Research on preschoolers supports this concern. Lillard and Peterson (2011) found that just nine minutes of viewing a fast-paced cartoon had immediate negative effects on 4-year-olds’ executive functioning, including skills related to self-regulation and working memory. These are the same skills children need at school to listen, wait, remember directions, control impulses, and complete work.

For this reason, families should be especially cautious with YouTube Shorts, TikTok-style videos, reels, fast gaming, and rapid app switching. These types of media are designed to hold attention through constant change. Unfortunately, the classroom requires the opposite skill: the ability to stay with one task even when it is quiet, slow, challenging, or repetitive.

A helpful school-week routine could include no screens before school, no screens during meals, no screens during homework or reading time, and no screens for at least one hour before bed. It may also help to keep devices out of the bedroom, turn off autoplay, turn off notifications, and avoid using screens as the main way to calm boredom or frustration. The goal is to help the child practice the same skills needed at school: patience, persistence, listening, waiting, independence, and self-control.

Reducing device use is not about punishment. It is about giving the child’s brain and body the best chance to be ready for school. A child who has more time for sleep, outdoor play, reading, drawing, building, puzzles, chores, and conversation is practicing the habits that support learning. These slower, real-world activities help strengthen attention in a way that fast-moving digital content often does not.

In short, what happens at home with screens can directly affect how a child functions at school. Frequent short videos and heavy device use may make it harder for a child to focus, follow directions, complete work, regulate emotions, and participate successfully with peers. Reducing fast-paced screen use, especially during the school week and before bedtime, can support better attention, stronger self-control, and greater success in the classroom.

References

American Academy of Pediatrics. (2016). Media and young minds. Pediatrics, 138(5), e20162591. https://publications.aap.org/pediatrics/article/157/2/e2025075320/206129/Digital-Ecosystems-Children-and-Adolescents-Policy

American Academy of Pediatrics. (2016). Media use in school-aged children and adolescents. Pediatrics, 138(5), e20162592. https://publications.aap.org/pediatrics/article/157/2/e2025075320/206129/Digital-Ecosystems-Children-and-Adolescents-Policy

American Academy of Pediatrics. (2025). Screen time guidelines. https://www.aap.org/en/patient-care/media-and-children/center-of-excellence-on-social-media-and-youth-mental-health/qa-portal/qa-portal-library/qa-portal-library-questions/screen-time-guidelines/?srsltid=AfmBOoofnyprjp5C99IU8b_an-UO6OyJhJFRDE5Q1sX_4qSQNroskvDH

Chiencharoenthanakij, R., et al. (2025). Short-form video media use is associated with greater inattentive behaviors among school-age children. Brain Behav. 2025 Jul;15(7):e70656. doi: 10.1002/brb3.70656. PMID: 40619997; PMCID: PMC12230358. https://pmc.ncbi.nlm.nih.gov/articles/PMC12230358/

Lillard, A. S., & Peterson, J. (2011). The immediate impact of different types of television on young children’s executive function. Pediatrics, 128(4), 644–649. https://pmc.ncbi.nlm.nih.gov/articles/PMC9923845/

Pickard, H., et al. (2024). Toddler screen use before bed and its effect on sleep and attention: A randomized clinical trial. JAMA Pediatrics. 2024 Dec 1;178(12):1270-1279. doi: 10.1001/jamapediatrics.2024.3997. PMID: 39432278; PMCID: PMC11581737. https://jamanetwork.com/journals/jamapediatrics/fullarticle/2825196

Tamana, S. K., et al. (2019). Screen-time is associated with inattention problems in preschoolers: Results from the CHILD birth cohort study. PLOS ONE, 14(4), e0213995. https://pmc.ncbi.nlm.nih.gov/articles/PMC6469768/

World Health Organization. (2019). Guidelines on physical activity, sedentary behaviour and sleep for children under 5 years of age., https://iris.who.int/server/api/core/bitstreams/bfce7d1e-43d8-4e28-ba1b-8f6cf9da2661/content