Fifth graders learn that the letters after a filename's dot reveal what kind of file it is, from .jpg images to .mp3 audio, and match each extension to what it holds.
Students will be able to…
A file named photo.jpg and one named report.pdf hold very different things. What do the letters after the dot tell you, and why does it matter?
Project this and match each file type to what it stores — tap a file type, then tap what it holds.
Tap any phase to open the teacher moves and student actions.
A file named photo.jpg and one named report.pdf hold very different things. The letters after the dot tell you which. What do they mean?
Students match each extension to what it stores.
Students choose a format for a job.
Students build a quick guide.
Students reflect on file types.
Aligned to the CSTA K-12 Computer Science Standards and the ISTE Standards for Students.
Represent data using different file formats and explain the trade-offs of each.
Collect and organize data in files to make it useful for a purpose.
Model how a computer stores and organizes data in files.
Empowered Learner: use technology to seek, store, and organize files and data.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students list five file types, write what each stores, and add an example use, so reading an extension becomes second nature. A printable file-types worksheet is in the Computer Science library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.