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CD and DVD

Today,  there is a wide range of educational CDs and DVDs for school children of all ages, available in various stores as well as online. They help in transforming our passive system of learning into an interactive one with the help of high-quality graphics and videos along with text, that help children retain things in their memory for a long time.

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Depending on the age and the requirement of the child, parents can choose from a large range of CDs and DVDs. These can include topics like numbers, ABCs, Shapes, rhymes, colors, stories and more. For older school kids looking for help with their academics, there are other DVDs and CDs in subjects like math, science, English, and others. These DVDs and CDs can be used for home learning where they can understand various concepts clearly.

Extra Benefits of Learning Through Educational CDs and DVDs

  • They provide a good overall experience for children
  • Preschoolers can easily learn pre-reading skills with the help of these digital tools
  • School going children can easily understand the concepts through various graphical representations and illustrations.
  • Practice sessions using the tools can enhance their knowledge considerably on various topics.

Where to Buy educational CDs and DVDs?

Educational CDs and DVDs are easily available online through various stores. Parents can order them online and get them delivered to their homes. These online stores also offer various discounts and offer to their customers making the deal more attractive. Using these educational CDs and DVDs is very easy as they are enabled with the Autoplay feature which helps play the CD or DVD automatically. However, in case of any assistance, there is a user manual as well, that provides instructions on using them. 

CD and DVD both are high definition, high storage devices.

Following are the important differences between CD and DVD.

Sr. No.KeyCDDVD
1DefinitionCD stands for Compact Disk.DVD stands for Digital Versatile Disk.
2SizeCD size is 700 MB.DVD size ranges from 4.7 GB to 17 GB.
3Recording LayerRecording layer or metal layer is close to top of the disk.Recording layer or metal layer is close to middle of the disk.
4PitsCD have single layer of pits.DVD have double layers of pits.
5Space between loopsSpace between spiral loops is 1.6 micrometer in CD.Space between spiral loops is 0.74 micrometer in DVD.
6Space between pitsSpace between pits is 0.834 micrometer in CD.Space between pits is 0.40 micrometer in DVD.
7Correction codeCIRC and EFMP are used as error correction code.RS-PC and EFMplus are used as error correction code.
8Data Transfer RateData Transfer Rate is 1.4 to 1.6 Mb/Sec.Data Transfer Rate is 11 Mb/Sec.
9Channel Bit LengthChannel Bit Length in CD is 300 nanometer.Channel Bit Length in CD is 113 nanometer.
10Numeric ApertureNumeric Aperture of CD is 0.45.Numeric Aperture of DVD is 0.6.
11ThicknessCD thickness is 1.2 mm.DVD thickness is 0.6 mm.

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