Technology & computer science
Binary Numbers: Counting with Only 0 and 1
Students convert between binary and decimal using a place-value chart, decode a secret word, and add two binary numbers.
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Technology & computer science
Pictures Made of Numbers: Pixels, Run-Length Codes and RGB Colors
Students turn binary rows into a pixel picture, shorten rows with run-length codes, read red-green-blue color values and calculate how much storage a small image needs.
Technology & computer science
Search and Sort Like a Computer
Students find patterns in number sequences, compare two ways to search a list, and sort a short list by hand.
Technology & computer science
Searching: Linear Search vs. Binary Search
Students search a sorted list of 15 numbers two ways, count how many checks each method needs, and discover why binary search is so fast.
Technology & computer science
Secret Numbers Behind Text: Reading and Writing ASCII Codes
Students use a provided ASCII table to turn words into numbers, decode secret messages, and connect letter codes to binary.