# Interactive Worksheets: Surds

**URL:** <https://community.wolfram.com/t/interactive-worksheets-surds/15134>\
**Category:** Questions\
**Tags:** education, demonstrations, interface-construction\
**Created:** [December 18, 2019, 8:15pm UTC](https://community.wolfram.com/t/interactive-worksheets-surds/15134 "2019-12-18T20:15:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![portnykhv](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/portnykhv/32/27312_2.png) [@portnykhv](https://community.wolfram.com/u/portnykhv)\
**Post date:** [December 18, 2019, 8:15pm UTC](https://community.wolfram.com/t/interactive-worksheets-surds/15134/1 "2019-12-18T20:15:45Z")

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This is a different type of Wolfram Demonstration Project: Interactive Worksheets. This interactive worksheet provides unlimited practice for responsible learners of all abilities and backgrounds to master surds simplification.

Do you think this is a valid Demonstration Project? (see surds.nb attached).  
Can someone help me to fix it, please? There is a parsing error at the point of uploading.

My notebook dragedropv1.0.nb is attached as the ultimate reference.

[DragDropv1.0.nb](https://community.wolfram.com/uploads/short-url/mIDIf7qCHThmALApxHM3vZrxhnu.nb) (64.9 KB)  
[Surds1.nb](https://community.wolfram.com/uploads/short-url/oc0BpWuQOEtZtXay29DUKbpmzMF.nb) (371 KB)