✏️ Latest scribble · October 28, 2026
How to Randomize a Classroom Seating Chart
Fair methods plus when never to randomize.
❓ Is random seating fair? ❓ How often should I randomize? ❓ What if students hate the draw?
Read this postThe PrimeFreeTools blog
Guides, walkthroughs and tool news. Every post is filed under the tool or topic it belongs to.
Sep 16, 2026
MAC Vendor Lookup: Who Made That Device on Your Network
Identify manufacturers from MAC prefixes.
Read postSep 16, 2026
IPv4 Subnet Calculator: Masks, Hosts, and Ranges Without the Binary
Network masks, wildcards, and host ranges.
Read postSep 16, 2026
Music Transposer: Shift a Chord Sheet in Semitones
Shift key and chords.
Read postSep 16, 2026
UTM Tracking for Affiliate Marketing Programs
If you spend any budget or effort driving digital traffic—whether running Google Ads, emailing newsletters, posting on LinkedIn, or recruiting candidates online—knowing…
Read postSep 16, 2026
Piano Note to Frequency: A4 at 440 and the Math In Between
Note to Hz.
Read postSep 16, 2026
How to Integrate UTM Tracking with CRM Systems
If you spend any budget or effort driving digital traffic—whether running Google Ads, emailing newsletters, posting on LinkedIn, or recruiting candidates online—knowing…
Read postSep 16, 2026
Tone Generator: Sine, Square, Saw, and a Little Science
Sine/square/saw frequencies.
Read postSep 16, 2026
BPM Tap Tempo: Find a Song’s Speed by Tapping Along
Tap to find BPM.
Read postSep 16, 2026
Metronome: Steady Beats Without Buying a Box
Tap tempo and beats.
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