This slide file is done to make the teaching easy to understand for the student and a supporting resource for the teacher, just enjoy .
Here you have about subject , with lot of grahics.
Yo are all free to use the material
Material prepared by Erick Melendez.
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This resource does not contain any images, words or ideas that would upset a reasonable person in any culture.
This resource is licensed by Erickperu1
under the iSLCollective Copyright License