| ceiling | Standard, Standard.Debug, Standard.Pipes |
| centered | Extras.Geometry |
| characters | Standard, Standard.Debug, Standard.Pipes |
| chartreuse | Extras.Colors |
| choice | Standard, Standard.Debug, Standard.Pipes |
| choices | Standard, Standard.Debug, Standard.Pipes |
| Circle | Extras.Geometry |
| circle | Standard, Standard.Debug, Standard.Pipes |
| circle_circle | Extras.Geometry |
| clap | Standard.Pipes |
| clipped | Standard, Standard.Debug, Standard.Pipes |
| cloned | Standard, Standard.Debug, Standard.Pipes |
| closedCurve | Standard, Standard.Debug, Standard.Pipes |
| closedCurvePoints | Extras.Cw |
| coarsenum | Extras.Geometry |
| coarsepoint | Extras.Geometry |
| coarse_gt | Extras.Geometry |
| coarse_lt | Extras.Geometry |
| coarse_ne | Extras.Geometry |
| coincidental | Extras.Animation |
| Color | Standard, Standard.Debug, Standard.Pipes |
| colored | Lessons.Logic, Standard, Standard.Debug, Standard.Pipes |
| colorIn | Standard.Pipes |
| coloring | Extras.Animation |
| colorNamed | Standard, Standard.Debug, Standard.Pipes |
| colorWheel | Extras.Colors |
| combined | Lessons.Logic, Standard, Standard.Debug, Standard.Pipes |
| combinedMotions | Standard, Standard.Debug, Standard.Pipes |
| concatenated | Standard, Standard.Debug, Standard.Pipes |
| contains | Standard, Standard.Debug, Standard.Pipes |
| Context | |
| 1 (Type/Class) | Extras.Game |
| 2 (Data Constructor) | Extras.Game |
| coordSize | Extras.Geometry |
| cornerAngles | Standard, Standard.Debug, Standard.Pipes |
| cos | Standard, Standard.Debug, Standard.Pipes |
| counter | Extras.Widget |
| cumulativeSums | Standard, Standard.Debug, Standard.Pipes |
| curve | Standard, Standard.Debug, Standard.Pipes |
| customGraphed | Extras.Cw |
| customPagesOf | Extras.Cw |
| customTurtle | Extras.Turtle |
| cyan | Extras.Colors, Lessons.Bear |